Mark C Goode

US Patent:

6833417, Dec 21, 2004

Filed:

Apr 29, 2004

Appl. No.:

10/835412

Inventors:

Fred David Ehrman - Houston TX
Mark Bradley Davis - Hurricane WV
Ronald Steven Eisinger - Charleston WV
Mark Gregory Goode - Hurricane WV
Michael Allen Kinnan - Charleston WV

Assignee:

Univation Technologies, LLC - Houston TX

International Classification:

C08F 234

US Classification:

526 82, 526 84, 526 86, 526901

Abstract:

A process of transitioning from a first polymerization reaction conducted in the presence of a mixed catalyst system to a second polymerization reaction conducted in the presence of a chrome-based catalyst system is disclosed, the polymerization reactions being conducted in one embodiment in a polymerization zone of a gas phase fluidized bed reactor which contains a fluidized bed of polymer particles by the essentially continuous passage of monomer gases through the polymerization zone, comprising: a) discontinuing the introduction of the mixed catalyst system into the reactor; b) maintaining polymerization conditions in the reactor and permitting polymerization to continue for a period of time to allow the components of the mixed catalyst system present in the reactor to produce additional polymer particles; c) introducing a deactivating agent into the fluidized bed in an amount sufficient to deactivate the mixed catalyst system; d) establishing optimal conditions within the reactor for the chrome-based catalyst system; and e) introducing the chrome-based catalyst system into the reactor characterized in that the amount of polymer particles in the fluidized bed is substantially maintained in the polymerization zone during the transition steps.

US Patent:

8637615, Jan 28, 2014

Filed:

Nov 16, 2010

Appl. No.:

13/515418

Inventors:

Dongming Li - Houston TX, US
Ching-Tai Lue - Sugar Land TX, US
Chi-I Kuo - Humble TX, US
Mark G. Goode - Hurricane WV, US
Stefan B. Ohlsson - Keerbergen, BE

Assignee:

Univation Technologies, LLC - Houston TX

International Classification:

C08F 2/00
C08F 4/6592

US Classification:

526 73, 526160, 526165, 526348, 526943

Abstract:

Provided is a method for making a polyolefin comprising contacting one or more olefins in a reactor containing a catalyst; polymerizing the one or more olefins to produce an olefin polymer characterized by a first melt flow ratio (MFR) and a first haze; and altering the reaction temperature in the reactor to shift the first MFR to a MFR that is different than the first MFR and to shift the first haze to a haze that is different than the first haze.

US Patent:

20190031841, Jan 31, 2019

Filed:

Jan 23, 2017

Appl. No.:

16/072213

Inventors:

- Houston TX, US
Dongming Li - Houston TX, US
Barbara J. Kopp - Middlesex NJ, US
Mark G. Goode - S. Charleston WV, US

Assignee:

Univation Technologies, LLC - Houston TX

International Classification:

C08J 5/18
C08F 4/24
C08F 210/16
C08L 23/08

Abstract:

A film formed from a polyethylene copolymer using a reduced chromium oxide catalyst, ethylene monomers and a co-monomer selected from butene monomers or 1-hexene, where the polyethylene copolymer has a density in the range of from about 0.935 to about 0.950 g/cmand an I/Iin a range of about 18.0 to about 30.0. The film formed from the polyethylene copolymer has a dart drop impact (g/m) that significantly greater as compared to a film of the polyethylene copolymer formed using a silyl chromate catalyst in place of the reduced chromium oxide catalyst. A method of making such films is also provided.